Method of corrugating cylinders



June 3, 1.941.

A. G. WERY ETAL METHOD CQRRUGATING CYLINDERS Filed Feb. 28, 1938 2 sheets-sheet 1 [berl' G. Wem; @Malfa/'7. Peppler June 3 1941- A. G. WERY ET AL 23435932 METHOD OF CORRUGATING' CYLINDERS Filed Feb. 28, 1958 2 Sheets-Sheet 2 Patented June 3, 194i Martien or contrecarrer; Gymnase Albert G. Wery, Sunnyside, and Leslie A. Peppler, Staten Island, N. Y.

applicati@ February 2s, 193s, serial No. 19e-,iss

(ci. 15e-73) 2 Claims.

This invention relates to a method of corrugating cylinders and forms a continuation in part of our co-pending application, Serial No. 54,104, filed December 12, 1935, which is now Patent No. 2,112,509,` entitled Apparatus for corrugating cylinders.

A primary object of this invention is the provision of an improved method of corrugating cylinders whereby an improved corrugated article is provided.

A further object of this invention is the provision of an improved method of corrugating cylinders wherein a plurality of sections of cylinders may be simultaneously corrugated and secured together by such corrugation.

A still further object is the provision of an improved method of corrugating cylinders Whereby any number of corrugated sections may. be relatively simply connected.

A still further object is the provision of an improved method of connecting corrugated cylinders.

A still further object lies in the provision of a method whereby one end of the cylinder is left uncorrugated to receive the end of a wholly uncorr-ugated cylinder or closed end boot and the corrugating process then continued over such overlapped ends whereby the same are corrugated together and the corrugations continued along the second named cylinder, thus providing u one continuous series of transverse corrugations through two or more sections of cylinders or through a cylinder section and the open end of a boot, and automatically providing means whereby said sections are secured together` by .said corrugations. The corrugations are a series of equally spaced transverse corrugations of uni- Figure 2 is a partly sectional'end view thereof taken on the line 2-2 of Figure 1,

Figure 3 is a detail View partially in section of a plurality of sections of cylinders and an end boot corrugated and secured together in accordance with this invention,

Figure 4 is a View similar to Figure 3 but show.v

ing a tapered shell provided with a slip joint,

Figure 5 is. a sectionalv view of a corrugated.-

l readily understood.

vfully described and claimed in the above mentioned parent application is hereinafter described in `some detail vin order that the method which comprises the instant invention may be more It will be understood by those skilled in the art that the proportions of metal thickness, size of corrugations and other details of construction, as disclosed in the drawings, are for purposes of illustration only and are not critical dimensions.

The reference character I refers to a support ing base 'upon which are suitably rigidly secured the upstanding brackets 2 and 3 and also upon which is vsuitablyl secured the I beam supporting member 4. Another supporting bracket ii is also suitably secured upon the base I.

Suitably journaled in bearings B and 'I in the brackets 2 and 3 respectively, and in the bearing 8 on the bracket 5, is a mandrel shaft 9 provided with an extending circumferentially corrugated mandrel portion lil, the teeth of `which are rounded and disposed in spaced relation, on "the mandrel.

The opposite end of the mandrel shaft 9 is reduced and is journaled at its extreme end in the bearing 8. Freely rotatable upon the mandrel shaft 9 is a pair of spaced, oppositely disposed i bevel gears il and I2 meshing with va bevel gea-r I3 dis-posed at right angles thereto, and secured upon shaft I 3a. Each of the gears II and I2 are provided with clutch faces I4 and splined upon the shaft 9 between the gears II and I2 are clutch members I5 adapted to selectively engage and be driven by either gear II or gear I2 or to occupy the neutral position shown in Figure l. The clutchlever I6 is pivoted as at I1 on one end of the bracket 3 and this lever has suitable means, not shown, for engaging Withina groove I9 in the clutch member whereby upon rocking the lever iin one directionor another said clutch will be slid along the shaft to engage either of the clutches'IIl on the gears I I and I2.

It will be clear that if the clutch member I5 engages the corresponding clutch member on the gear II, the shaft 9 will be rotated in one direction. If the opposite clutch member I5 engages the corresponding clutch member on the gear I2, the'shaft 9 will be rotated in the opposite direction. Also obviously, if the clutch lever I6 is in the neutral position shown in Figure 1, the gears Il and i2 will rotate freely on the shaft 9 and consequently the said shaft with mandrel I will be at rest. Any suitable means, not shown, such as an electric motor, may be provided to drive the shaft i3d.

The upper end of the clutch lever I6 is pivotally connected to one end of a rod 20 slidably mounted in journals 2| formed on the tops of brackets 2 and 3 and on the top of a bracket 22 provided at the opposite end of the machine. -Handles 23 are provided on the rod 29 at spaced points whereby,

an operator may conveniently reach and take hold of one of said handles and slide the rod longitudinally in either direction to actuaterthe clutch lever. A, Y

Adjustable collars 24 are also provided on -the rod 2i) and adapted to be set in selected positions and secured in such positions by the thumb screws 25. These collars serve as automatic clutch actuating means in a manner which will be described.

`Also journaled in the brackets 2 and 3 at a point spaced from and parallel to the mandrel shaft 9 and in substantially the same plane therewith, is a shaft 26 carrying a pinion 21. 'I'his pinion meshes with a similar pinion upon the mandrel shaft 9 and also meshes with a gear 29;

upon a shaft 39 likewise journaled in the brackets 2 and 3, The opposite end of this splined shaft 39 projects beyond the bracket 2 and is disposed parallel with the mandrel I0', the extreme end being supported in the bracket 22. The gear 29 meshes with a pinion 3l on a shaft 32 also journaled in the brackets 2 and 3 and projecting beyond the bracket 2 and having its opposite end journaled in the `bracket 22, .the extreme end of such shaft being squared as at 33 to receive a wrench or other tool whereby the same may be rotated by hand. This shaft 32 is screw-threaded as at 34 for a purpose to' be described.

FiXediy mounted Yat the upper ends of the brackets 2, 3 and 22, and extending longitudinally and parallel with the screw shaft 32, the shaftfSil, and the mandrel I0, is a supporting cylinder `35vupon which is slidably mounted carriage 36 provided on its upper side with an apertured lug 31 through which passes the clutch rod 29. The carriage 36 is provided with downwardly extending supporting arms 38, the lower ends of which carry a bearing member 39 slidable upon the shaft 30.

Journaled upon theV shaft 30 to vpivot about the same inspaced relation on opposite sides of the carriage'member 39, is a pair of bell crank arms, the upper legs 49 of which converge into a single threaded journal 4l through which is threadably mounted an adjusting screw 42 provided with a hand wheel 43 on its outer end. The opposite legs 44 of the bell crank levers (see Figure 2) extend angularly toward the rear of the machine above the mandrel lilV and support a fixed shaft 45 upon which is Vrotatably mounted` the corrugating tool 46. The extreme-rear ends of the legs 44 are connected by a bar 41.

Alsorotatably mounted upon the shaft 45 and secured, one at each end, to the corrugating tool V46 are the gears 45a adapted to meshwith similar gears 43h splined upon the shaft `3l] to rotate therewith and capable of sliding therealong These gears 45h are disposed between the pivot points of the bell crankarms 4U46 and 44-f44.

Carried upon the rear `side of the carriage 36 (seeFigure f2),V is a cylinder housing 48 within which ,is disposed a plunger or piston 49.. A source ofV air pressure 59 -communicates'withthe.

interior of the housing below the piston whereby upon operation of a suitable valve by the 0perator to admit compressed air into such housing, the piston is forced upwardly. Connected to the piston 49 and projecting downwardly out of the housing 48 is a rod 5i having a pivotal connection as at 52 with a link 53, the lower end of which is pivoted as at 54 to the tie rod 41.

Suitable resilient means, not shown, forces tie rod 41 downwardly whereby normally bell crank arms 41 and corrugating tool 46 are forced into mandrel engaging position. Obviously however, ifthe operator admits air pressure into the housing 48 as described, the upward movements of the piston 49 will instantly lift the corrugating tool vabove the mandrel. The corrugating tool may also be raised above the mandrel, and its pressure against the mandrel adjusted by means of the adjusting screw 42 and hand wheel 43, the inner end of the screw 42 bearing against a lug 59 formed on the carriage 36.Y

-Thef downwardly .depending supporting arms 38 on -the carriage 36 are provided with a threaded boss 60 throughwhich passes the lead screw or threaded shaft 34,' the threads thereof engaging the threads in said boss whereby rotation of the shaft serves to slide the carriage 36 and the corrugating tool longitudinally of the mandrel il).

The boss 31 on the carriage 36 serves to engage with one of the collars 24, depending upon the direction of travel,V when a predetermined length of travel has been reached and move the clutch rod 2i] longitudinally to actuate the clutch lever.

A section Vof pipeor cylinder shell is adapted to be loosely Ymounted upon the mandrel l'-as shown clearly in Figure l, in position for the corrugating tool 46 to engage-thereagainst and for the spiral thread thereof to press` the wall of the shell or cylinder into the Icorresponding cor-rugations of the mandrel iii whereby to cor- Y there is .provided a suitable bracket 62 supporting a pair of bearing ro1lersi6'3 provided; with teeth corresponding to thev mandrel teeth and Lthus forming a roller bearingforV the'pro'jecting end ofthe'mandrel; `L' v -Suitable means are also provided on supporting beam 4 to prevent the pipe from being forced to Vone side or the other of .the mandrel bythe action of the embossing toolgf I In the corrugatingof the pipeA the'. end thereof may be left uncorrugatedzfor a 4short distance as shown in Figure 1, so as'to receive an adjacent uncorrugated cylinder and the overlappingor telescoping ends are then corrugated together as shown in .Figure 3,1 whereby' to secure-such ends together and to .provide aluniform series ofequally spacedtransverse corrugations'of uniform cross-section Vthroughout vthellength` o'f one orV a plurality of. sections... .These pipesections are.

generally formed slightly tapered. which facilitatesthis telescoping of..adjacentends..4 t'.

In .operation thecarriage:withthe .corrugating tool; is `first @adjusted,"longitudinally ontlie Supporting members `3l) and 3,5` to the .desired position with respect to the mandrel Vfor .beginning the 4corrugating operation, this` adjustment being `made either by hand. yby turning the. lead; screw- 34 by means of asutable tool engaging the squared end 33 thereof, or by pOwer drive from drive shaft i3d, through either bevel bear Il or l2, shaft 9, pinion v 213,1;inion 21,` gear .2;9 and pinion 3l. The rotation of the lead :Screw Aresults in longitudinal sliding movement J of the carriage 36 and bearing 3.9 along the supporting members 3.5 and 33, with consequent, sliding and rotative movement of the ellibossi-ng tool .carried thereby. .Obviously the corrugatiue `Oberrrtorr may vbe .begun at either .end Of the mandrel,A the latter beine rotatable in either direction. as, .above explained.

With the parte :thus set.. the corr-nicotine .tool is .raised above the mandrel, either by Operating the hand wheel and screwl 4.2 .or by permitting airV to enter the cylinder below the .piston 49, resulting in rock-ing the bell crank arms 4 4 upwardl-yv about their pivot. 30;. and carrying with them the shaft 4,5 and, embossing tool. A8,.

An uncorrugated shell is now placed upon the mandrel l and, slidinwardly on the same until theend of the shell eng-ages the stop Vlil.

The corrugating tool is now lowered into en,- gagement with the shell and suflicient pressure is exerted by the resilient means to cau-se the spiral of the corrugating tool to ,pressy the wall of the shell` or pipe into` the corrugations of the mandrol thus forming a series of equally spaced transverse corrugations. of uniform .cross-section. It maybe .explained here that the lthread of the corrugating tool is spirally disposed, so that as the corrugating proceeds, the corrugating tool adopt-s a screw actionv in following the non-spiral grooves of the mandrel.

The collars 24 are now adjusted on the clutch rod so as to be engaged by the boss 31 on the carriage 36 when such carriage has reached a predetermined position with respect to the end of the shell 61, preferably when the corrugating tool has come within ashort distance of the end of the shell.

With the drive shaft l3a rotating, the clutch rod is now actuated to cause rotation of the mandrel shaft 9, shaft and lead screw 32, in the desired direction. The shell 61 rolls around the mandrel l 0 between the said mandrel and the embossing tool and is corrugated in the manner shown, the corrugating tool and carriage being simultaneously moved along by the lead screw 34.

.The shell is prevented from swinging outwardly or becoming displaced by means of the roller supports 66 engaging the inner wall thereof. The corrugating tool and the mandrel rotate in opposite directions.

When the corrugating operation has reached the desired point adjacent the end of the shell section, the clutch I5 is moved into neutralposisimply lifted and, pulled freely from the mandrel. Now, if desired, a new and .uncorrugated section, such as shown `at 3l in Figure 3, may be engaged together .at their ends by .telescoping the` said ends Vfor ashort distance, the normal taper usually provided on .the shells making this a convenient .and easy operation.

Assuming that vthe embossing or corrugating operation hasr proceeded from left to right in Figure 1, in .the operation just described, vthe new shell is now placed upon the mandrel first, with its inner end engaging against the stop El and with its opposite joined end and the section just corrugated supported upon the mandrel.

The corrugating tool and its associated carriage are now lowered intoengagement with the previously `corrugated section adjacent the termination of the .corrugations thereof and the clutch moved .to drive the parts in the same direction as before. vThe corrugating proceeds as before through the overlapping ends of the two sections and continues until the end of the previously uncorrugated section or .a predetermined point short of the end thereof has been reached.

Thereupon the corrugating tool and carriage are again raised, either manually or automatically rby .the other .collar 24, causing the parts to stop. Obviously lthis can continue until as many sections of shell as desired are corrugated and secured together to the end or ends of the endmost sections.

To sum up, the method herein described relates to making tubes of substantial length in which the tubes are composed of a plurality of sections for-med with a continuous series of equally spaced transverse corrugations `of uniform cross-section. The steps of formi-ng these tubes consist in corrugati-ng asection of sheet metal pipe except for an extreme end portion thereof and thereafter telescoping a second uncorrugated section into the uncorrugated end of the rst section. Thereafter the telescoping sections are interlocked by continuing the uniform corrugations in the telescoped tube sections and the corrugations continued throughout the length of the additional tubes in a direction toward the free end of the additional sections. The first section may be either a tube section or an end boot as disclosed in the drawings.

Having reference now to Figure 3 there is shown a corrugated shell 61 corrugated, in accordance with the methods of this invention, in sections, which sections are secured by corrugations, as at 80. To the lowermost of sections 61 Y is secured an end boot 3| provided with a bottom tion either manually by means of the handles 23 or automatically by the boss 31 engaging one of the collars 24, thus stopping the further rotation of the mandrel and corrugating tool. Of course, in some instances, as desired, the corrugating of a section of shell may be carried to the extreme end thereof.

The corrugating tool and carriage is now raised above the mandrel in the manner previously described and the shell removed from the mandrel, this removal being wholly unhindered and unimpaired by any part of the machine and requiring no other disconnection of parts. The section is portion 82 secured to the lowermost of sections 31 in the manner previously described.

'In connection with joining the sections 31, interorly of boot 8l, is placed a light gauge steel pan 83 in order to reenforce the end section when driving the boot into the ground. If desired a hole 84 may be positioned in end portion 82 of boot 8l and a corresponding hole 84 may be positioned in pan 83 in order that the composite structure may be connected with a pipe or lower section of wood or other material to form a composite pile.

Figure 4 discloses a tapered pile made in accordance with this invention comprising a plurality of sections 93 and an end boot 9i. Certain of sections S0 may be connected by corrugations, as at 92, in accordance with the principles of this invention and certain other sections may be connected as by a slip joint s3 in order that composite sections of a pile may be transported vto the locality at which it is .'desired'that they vbe' used whereupon the slip joint 93 permits ready assem'- bly of a plurality of sections. A reenforcing pan 94 may be positioned in the boot of'end section 9| for a purpose similar to that of pan 83. j

Figure discloses a plurality of pipe sections |00 of particular utility for use as a culvert. Certain of sections |00 are connected by meansof the corrugation in the manner previously de'- scribed as at Iil, and certain others may be connected, as by means of a conventional connecting band |02 provided with angles |03 through which may be passed clamping bolts |04 in a known manner.

Now from the foregoing it will be'seen that there is herein provided a method of corrugating cylindrical pipes as well as a method of joining certain of =the corrugated pipes or cylinders which accomplishes all Ithe objects of this invention and others including many advantages of great practical utility.

As many embodiments may be made of the inventive concept herein set forth and as many modications may be made in .the embodiment described and shown in the accompanying drawings it is to be understood that all matter herein set forth and shown is to be interpreted merely as illustrative and not in a limiting sense.

We claim as our invention:

1. The method of making tubes of ysubstantial length wherein the tubes are composed of a plurality of sections and are formed With one continuous series of equally spaced transverse corrugations of uniform cross-section, comprising the steps of forming such corrugations in a first section except for an extreme end portion thereof, telescoping a second uncorrugated section into the uncorrugated end of `the said first section,

thereafterV progressively forming interlocking corrugatlons of the original uniform cross-seo- .tion Aand spaoingsimultaneously in both of the telescoped` tube sections throughout their length in 5a direction toward the free end of the second section, and thereafter progressively forming corrugationsV of the original uniform cross-sectionV and spacing in the remainder of the second section ina directionrtoward the free end of the second section.

2. The method of making tubes of substantial length wherein the tubes are composed of a plurality of sections and are formed with one continuous series of equally spaced transverse corrugations of uniform cross-section, comprising the steps of forming such corrugations in a first tube section except for the extreme end portions thereof, telesooping anend boot into an uncorrugated end of said rst tube section; then progressively forming interlocking corrugations of the original uniformcross-section and spacing simultaneously in both of the telescoped sections throughout their length in a direction toward the free end of the boot, then telescoping a second tube section into the remaining unco-rrugated end portion of the said rst tube section, then progressively forming interlocking corrugations of the original uniform cross-section and spacing-simultaneously in both of the telescoped sections throughout their length in a direction toward the free end of the second section, and thereafter progressively forming corrugations of the original uniform cross-section and spacing in the remainder of the second section in a direction toward the free end of the second tube section. i

- ALBERT G, WERY.

LESLIE A, PEPPLER. 

